Fuel burning hot air heating unit



A ril 29, 1952 E. G. WILSON FUEL BURNING HOT AIR HEATING UNIT Filed Nov. 30, 1948 3 Sheets-Sheet l .F'g-Z.

INVENTOR 1 I I BY I l I 1 ATTORNEYS April 29, 1952 E. G. WILSON FUEL BURNING HOT AIR HEATING UNIT 3 Sheets-Sheet 2 Filed Nov. 50, 1948 INVENTOR ATTORNEYS.

April 29, 1952 E. G. WILSON FUEL BURNING HOT AIR HEATING UNIT '5 Sheets-Sheet 3 Filed Nov. 30, 1948 Z. 6L WL'ZGOIZ/ INVENTOR ATTORNEYS.

Patented Apr. 29, 1952 UNITED STATES" PATENT OFFICE Edward G. Wilson, Iowa Falls, Iowa Application November 30, 1948, Serial No. 62,701

This invention relates to heating unit construction, and more particularly to the construction of heating units of the hot air type.

"The primary object of the invention'is to provide a heating unit wherein the products of combustion after leaving the combustion chamber of the unit are recirculated through the combustion chamber, the recirculated products of combustion which have partially cooled tending to temper the extremely hot gases and products of combustion passing from the burner, thereby reducing the danger of overheating any part of the unit, to a minimum.

Anotherobject of the invention is to provide a means for increasing the heat at underheated points inthe unit, thereby preheating the air passing into the furnace to be heated, reducing the quantity of air that must pass through the unit and become heated and exhausted through the chimney, lowering the heat loss to the minimum.

With the foregoing and other objects in view which will appear as the description proceeds, the

invention consists of certain novel details of construction-and combinations of parts, hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangementof parts without departing from the spirit of the invention as claimed.

Referring to the drawings.

Figure 1 is a perspective view of a heating unit constructed in accordance with the. invention.

Fig. 2 is a perspective view of the heating unit, the outer casing thereof having been removed.

Fig. 3 is a perspective view of the burner chamber.

Fig. 4 is an elevational view of the heating unit one of the side walls of the outer casing having been broken away illustrating the interior of the unit.

Fig. 5 is a sectional view taken on line 5-5 of Fi 4.

Referring to the drawings in detail, the reference character 5 indicates the outer casing of the heating unit, and the reference character 6 indicates the heating unit disposed in the outer casing which is supported in spaced relation with respect to the outer casing, providing a passageway I completely surrounding the heating unit 6, as clearly shown by Fig. 5 of the drawings.

The heating unit comprises the central combustion shell 8, lateral radiator shells 9 and I0, and a rear radiator shell II, the radiator shells 9 and It) being in communication with the cen- 1 Claim. (Cl. 126--1 16) 2 tral combustion shell 8, through the pipes] 2, the radiator shells 9, l0 and II being spaced from the walls of the section 8, providing inner passageways I3 for the passage of air to; beheated and circulated through the unit to pickup heat and be directed to the room areas to be. heated thereby.

As clearly shown' by Fig. 4 of the drawings, the heating unit has its bottom spaced from the bottom of the outer casing, providing a passageway l3 that communicates with the atmosphere, through the opening 14, to the end ,that fresh air may enter the passageway l3 for. circula tion through the various passagewaysof the unit to be heated. I

The rear radiator shell II is also connected with the central combustion shell at the rear thereof, by means of the pipe I 5 which establishes communication between the central combustion shell and upper portion of the rear radiator shell II, the pipe [5 constituting an outlet pipe for the products of combustion from the burner chamber IS. The flue connecting pipe 11 connects with the rear radiator shell II at a point intermediate its ends, and passes through the rear wall of the outer casing 5, where it connects with a flue not shown, for carrying off the products of combustion through a chimney.

The burner chamber I6 is supported on the brackets I8 that are secured within the inner combustion shells as shown, the burner chamber being provided with spaced walls 19 and 20 providing space 2| for the burner 20. The burner chamber also provides an air passageway 24 in the central part of the burner chamber and a space between heating unit 6 of combustion shell 8 and wall 20 of the burner chamber. As the burner operates, walls l9 and 20 become heated and cause the air on the outside of the walls to become heated and move upward on the outside of wall 20 and the inside of wall H3 or air pas sageway 24 creating a suction on the lower part of the central combustion shell 8 causing a circulation in the entire inner unit as shown by arrows A. The burner or fires'pace communicates with the atmosphere through the opening 22 at one end of pipe 23 thereby admitting fresh air into the combustion chamberto promote combustion.

As shown by Fig. 1, pipes 23' extend into the burner unit and supply the fuel to the burner used within the burner chamber, and which in the present showing is illustrated by the numeral 20.

From the foregoing it will be seen that due to theconstruction of the heating unit forming the subject matter of this invention, fresh air will be drawn into the combustion chamber through the pipe 23 where it becomes heated as it mingles with the.- products. ofcombustion passing upwardly from the burner chamber It. Hot gases or products of combustion pass in the direction of the arrows A, a portion of the-products of combustion passing downwardly and upwardly,

the heatin un t. will absor h he t nd wil c rc late, n the, at of trav l f h arr s B tempe n t a de ree the pipes I o P e ve hea g i hese. pipes T e a t e hea ed As the products of combustion pass and to be passed upwardly between the inner and outer shells of the heating unit, will be drawn into the unit through the opening 14.

Having thus described the, invention, what is l imed is;

In a ho i h ater, an oute c in a heat,

ing unit assembly disposed withinthe outer easing in spaced relation with the walls. of the outer casing, providing passageways completely surrounding the heating unit assembly. said heating 3 unit assembly embodying a central rectangular radiator shell having a lateral width equal to the total lateral widths of the heating unit assembly, said side radiator shells being arranged in spaced relation with the central rectangular combustion shell providing vertical air heating passageways, upper and lower pairs of pipes connecting the central rectangular combustion shell and side radiator shells, upper and lower pipes connecting the central combustion shell with the rear radiator shell, means forming a burner chamber adjacent the lower end of said combustion shell, said means comprising a rectangular box having an open top, a bottom, and an open ended duct extending upwardly from said bottom and in spaced relation to the walls of said box; to provide a burner chamber therein, a burner in said chamber mounted within the central combustion shell above the bottom of said chamber and from which products of combustion pass upwardly into the combustion shell, a flue through which products of combustion pass from the rear radiator shell, said outer casing having an air inlet opening admitting air to the heater at the base thereof, and pipes through which hot air passes from the heater.

EDWARD G. WILSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES TPATENTS 

